The talkies (1930)

Record Details:

Title:
The talkies
Date:
1930
Publisher:
London: Crosby Lockwood and Son
Volume:
The talkies
Leaf #:
000150
Language:
English
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
March 28, 2024
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

92 THE TALKIES renders the omission of a small section less noticeable. A series of experiments was at once started to trace every possible cause of noise, and some very unexpected sources were found. It was, for instance, ascertained after a series of laborious tests that a peculiar drumming or booming sound was caused by the vibration of the metal film-magazines. This trouble was stopped by the provision of a spongy rubber cover and by fitting baffle-plates, very similar to those in the silencers of motor-cars, which were in turn covered with sound-absorbing material, and drilled with a series of spiral holes. Ball bearings were, until recently, extensively used for cameras, but they were found to be a very troublesome source of noise, and had, when necessary, to be ruthlessly scrapped and replaced with plain bearings, the proper lubrication of which necessitated a further series of experiments, because it is of the utmost importance that while they should be adequately lubricated, no oil should be allowed to get on to the film, for it should be remembered that a coloured stain, while appearing quite transparent to the eye, may seriously offend the dilettante photo-cell. A good deal of trouble was found to lie in the